Haha, no it's not. It's pretty manageable no matter what position you play. If you're a military knight, then 150 gold limit only means that by tax day you must have less than 300 total in gold and bonds, preferably split 150 (+150) (I think that still works.) And honestly, if you're carrying around that much gold, you either are fielding hundreds of special forces, or aren't using your resources properly for unit and paraphernalia. Like any strategy game, resources mean nothing if they don't translate to strength.
If you're a duke or in some other position where you'd swim in gold, then you should have a secret safehouse to keep your treasure in. If you don't, you might want to reconsider how fit you are to be a greedy noble.
